A number of smaller applications gained so many users that they have made our weekly list of the top 20 growing apps — although, as usual, they are mostly games or quizzes. The most obvious “small app” is Zynga‘s FishVille, which we’ve covered separately as it grew by an impressive 8.24 million monthly active users last week to reach 9.24 million.

Considering FishVille is from the largest developer on the platform — and the one with the most cross-promotional power as well as money for advertising, let’s take a look at some smaller ones. Next on the list is Happy Aquarium from CrowdStar, a relatively small developer but an already-big app: It gained 1.93 million to reach 27.0 million monthly actives, on the same trajectory as past weeks. So moving right along down the list, we come to a quiz app.

	Name	MAU	Gain	Gain, %
1.	FishVille	9,238,698	+8,237,776	+89.17
2.	Happy Aquarium	27,054,550	+1,930,762	+7.14
3.	QuizBone	3,060,842	+1,329,416	+43.43
4.	Addict	1,119,044	+1,119,002	+100.00
5.	FarmVille	64,606,716	+902,322	+1.40
6.	Diva Life	1,589,777	+796,317	+50.09
7.	Island Paradise	6,085,569	+750,521	+12.33
8.	Little Warrior	2,324,123	+674,042	+29.00
9.	Friend Quiz	6,086,969	+635,005	+10.43
10.	friend.ly	4,398,092	+487,495	+11.08
11.	Yakuza Lords	1,229,559	+468,293	+38.09
12.	Facebook for iPhone	17,687,228	+448,596	+2.54
13.	Farmville Gifts	427,577	+401,200	+93.83
14.	Fish Life	1,611,848	+389,427	+24.16
15.	Mobile	9,693,660	+327,247	+3.38
16.	Texas HoldEm Poker	19,201,295	+323,468	+1.68
17.	Snowball Fight	335,255	+303,988	+90.67
18.	Roller Coaster Kingdom	15,426,497	+302,012	+1.96
19.	Band of Heroes	436,604	+293,784	+67.29
20.	Honesty Box	2,698,646	+285,759	+10.59

QuizBone, by Lyore Network, is a familiar idea: A quiz template that lets people create their own quizzes. The top example within the app is WHAT’S YOUR SWEAR WORD, with the tagline FIND OUT HERE YOUR SWEAR WORD AND USE IT MORE OFTEN. It has come out of nowhere, growing by 1.33 million to reach 3.06 million monthly actives. At number four, there’s Addict, a simple app that just gives you a percentage score of your Facebook addition based on how often you do things on the site. It grew all of its 1.12 million users last week.

Then, we have the first of three games on today’s chart from LOLapps: role-playing game Diva Life, which grew by 796,000 last week to reach 1.59 million monthly actives. LOLapps has been cooking up a range of RPG games lately, with Yakuza Lords and Band of Heroes also appearing further down on today’s list. Note that the latter two also made our up-and-comers list last Friday; that list looks at the top growing apps with between 100,000 and 1 million users, so clearly, and Yakuza Lords has since moved up into the AppData big leagues. On a design level, these games distinguish themselves not so much through the game mechanics but by having slick images and story lines, which something that cannot be said for some of the other RPGs on Facebook.

At number 8 on the list is Island Paradise, a farming-style simulation game from Neopets creator Meteor Games — it also showed up last week. At number 9 we have Little Warrior, a basic arcade-style game that also showed up last week.

At 10 and 11 are two friend-analyzing apps. The first, friendQuiz, has you go through a set of yes-or-no questions about your friends, then gives you a score about how well you know your friends. The second, Friend.ly, analyzes your friends’ profile meta-data and tells you stats like the top TV show from among everyone.

Facebook’s iPhone app and Mobile web app also make appearances, as they often do.

And another interesting one is FarmVille Gifts, which contrary to what the name suggests, is not made by Zynga. Instead, the app lets you send FarmVille-themed gifts to your friends but “NOT,” as the app makes clear, to your friends in FarmVille. This looks exactly like a trademark violation, to say the least. As we noted when we spotted the app in our up-and-comers list last week, we’re surprised it has not been shut down yet.